How to tell if your eggs are fresh
This easy tip will sort the good from bad eggs easily. Simply place eggs in a bowl of water. Those that are fresh will sink to the bottom and those on the top are bad. Over time an egg lets in air through the shell. This air bubble causes the egg to float when placed in water.
For poaching the fresher the egg the better. Eggs at stage 3 can be used for anything but they are good for hard boiling as they are easier to peel than very fresh eggs.